Abstract
Periodically data plane update is a necessary task in Software Defined Networking(SDN). Most prior approaches update many flows without considering which flows should be updated. Hence, most of them get long update delay. However, due to the dramatic increase of data arriving in data centers in the coming 5G networks, flows to be updated should be carefully chosen. Otherwise, unsatisfactory update delay may occur, which will make the route after the reconfiguration invalid for most flows and even bring about a poor user experience. In this paper, we present a Timely Route Update Scheme(TRUS). Different from previously proposed update approaches, TRUS not only meets the real-time route update demand for data centers, but also guarantees bandwidth requirements of delay-sensitive flows. Further, it can avoid the congestion on “hot” links in the update process. Simulation results verify the effectiveness of our scheme and demonstrate it can largely cut down the route update latency while obtaining a good network performance when comparing with some former approaches.
Highlights
Software Defined Networking(SDN) is a novel paradigm that decouples the network control and forwarding functions [1]
Inspired by the above mentioned views, we propose a Timely Route Update Scheme(TRUS) in this paper
Simulation results verify the effectiveness of our scheme and demonstrate it can largely cut down the total update delay while obtaining a good network performance when comparing with some former approaches
Summary
Software Defined Networking(SDN) is a novel paradigm that decouples the network control and forwarding functions [1]. Due to reasons such as the dynamic of flows, traffic load transfer, node/link failure in the network and so on [2], an SDN needs to repeatedly update the data plane Over fifty percent bytes of flows can keep longer than 25 seconds According to these characteristics, we can see that if route update of an SDN takes a long time, the reconfiguration may become useless because most traffic has expired. Different from previously proposed update approaches, TRUS meets the real-time route update demand of data centers, guarantees bandwidth requirements of delay-sensitive flows and avoids the congestion on ‘‘hot’’ links. We propose a scheme which can obtain real-time update, guarantee bandwidth requirements of delay-sensitive flows and avoid link congestion when performing route updates. We propose available methods to resolve deadlocks while ensuring bandwidth demands of time-sensitive traffic
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